2018 GMC Terrain MPG
EPA-rated · verified snapshot 2026-08-30 · Small Sport Utility Vehicle 2WD
The 2018 GMC Terrain gets 32 MPG combined — 28 city and 39 highway — in its most efficient configuration (1.6L · 4-cyl · Automatic 6-spd · Front-Wheel Drive · Diesel).
City28 MPG
Highway39 MPG
$2,500Fuel cost / yr (EPA est.)
319 g/miCO₂
DieselFuel
$-1,5005-yr fuel cost vs. average vehicle
7 / 10EPA Fuel Economy & GHG score
30 ft³Cargo volume
104 ft³Passenger volume
Where it sits among compact suvs (2018)
Compared with the 2017 model, the 2018 Terrain is +7 MPG better at its best.
Every 2018 Terrain trim
| Configuration | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|
| 1.6L · 4-cyl · Automatic 6-spd · Front-Wheel Drive · Diesel | 28 | 39 | 32 | $2,500 |
| 1.6L · 4-cyl · Automatic 6-spd · All-Wheel Drive · Diesel | 28 | 38 | 32 | $2,500 |
| 1.5L · 4-cyl · Automatic 9-spd · Front-Wheel Drive | 26 | 30 | 28 | $2,200 |
| 1.5L · 4-cyl · Automatic 9-spd · All-Wheel Drive | 24 | 28 | 26 | $2,350 |
| 2.0L · 4-cyl · Automatic 9-spd · Front-Wheel Drive | 22 | 28 | 24 | $3,150 |
| 2.0L · 4-cyl · Automatic 9-spd · All-Wheel Drive | 21 | 26 | 23 | $3,300 |
FAQ
Where does the 2018 Terrain rank among compact suvs for MPG?
The 2018 Terrain's 32 MPG combined is above the compact suvs average of 24 MPG for 2018.
How much does it cost to fuel a 2018 Terrain per year?
Based on EPA assumptions (15,000 miles/year), estimated annual fuel cost is $2,500 for the most efficient trim.
What is the city and highway MPG of the 2018 Terrain?
The most efficient trim is rated 28 MPG city and 39 MPG highway.